Dark matter from late decays and the small-scale structure problems

2007/01/31 by Francesca Borzumati, Torsten Bringmann, Piero Ullio · 6 citations
Physics and Astronomy · #Astronomy #Astrophysics #Context (archaeology) #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Gravitation #Gravitino #Graviton #Hot dark matter #Light dark matter #Neutrino #Neutrino oscillation #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Scalar field dark matter #Sterile neutrino #Supergravity #Supersymmetry #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevd.77.063514

published as Phys.Rev.D77:063514,2008 · Small changes, matches the published version

openalex publication_date 2008/03/12 · arxiv created 2008/03/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The generation of dark matter in late decays of quasistable massive particles has been proposed as a viable framework to address the excess of power found in numerical N-body simulations for cold dark matter cosmologies. We identify a convenient set of variables to illustrate which requirements need to be satisfied in any generic particle-physics model to address the small-scale problems and to fulfill other astrophysical constraints. As a result of this model-independent analysis, we point out that meeting these requirements in a completely natural way is inherently difficult. In particular, we reexamine the role of gravitinos and Kaluza-Klein gravitons in this context and find them disfavored as a solution to the small-scale problems in case they are dark matter candidates generated in the decay of thermally produced weakly interacting massive particles. We propose right-handed sneutrinos and right-handed Kaluza-Klein neutrinos as alternatives. We find that they are viable dark matter candidates, but that they can contribute to a solution of the small-scale problems only in case the associated Dirac neutrino mass term appears as a subdominant contribution in the neutrino mass matrix.

Citations

• Cusps in cold dark matter haloes
• Right-handed sneutrinos as nonthermal dark matter
• Neutralino dark matter detection in split supersymmetry scenarios
• Neutralino relic density including coannihilations
• Relic abundance of dark matter in the minimal universal extra dimension model
• Three‐YearWilkinson Microwave Anisotropy Probe(WMAP) Observations: Implications for Cosmology
• Review of particle properties
• Halo Substructure and the Power Spectrum

Cited by

• Dark Matter Candidates from Particle Physics and Methods of Detection
• Feebly interacting U(1)B−L gauge boson warm dark matter and XENON1T anomaly
• Particle models and the small-scale structure of dark matter
• Updated constraints on decaying cold dark matter
• Model-independent analysis of dark matter points to a particle mass at the keV scale
• WIMP dark matter from gravitino decays and leptogenesis